我在控制器中有一个方法,如下所示：
[HttpPost]
public void UnfavoriteEvent(int id)
{
try
{
var rows = _connection.Execute("DELETE UserEvent WHERE UserID = (SELECT up.UserID FROM UserProfile up WHERE up.UserName = @UserName) AND EventID = @EventID",new { EventID = id,UserName = User.Identity.Name });
if (rows != 1)
{
Response.StatusCode = 500;
Response.Status = "There was an unknown error updating the database.";
//throw new HttpException(500,"There was an unknown error updating the database.");
}
}
catch (Exception ex)
{
Response.StatusCode = 500;
Response.Status = ex.Message;
//throw new HttpException(500,ex.Message);
}
}
正如你所看到的,我尝试了几种不同的方法来抛出这个错误.在JavaScript中,我有以下块来调用此方法：
var jqXHR;
if (isFavorite) {
jqXHR = $.ajax({
type: 'POST',url: '/Account/UnfavoriteEvent',data: { id: $("#EventID").val() }
});
}
else {
jqXHR = $.ajax({
type: 'POST',url: '/Account/FavoriteEvent',data: { id: $("#EventID").val() }
});
}
jqXHR.error = function (data) {
$("#ajaxErrorMessage").val(data);
$("#ajaxError").toggle(2000);
};
现在,我想要做的是将抛出的错误抛回jqXHR.error函数,以便我可以正确处理它.
目前,取消注释的代码抛出一个异常,说我不允许放置在Status中的文本,并且注释代码实际上返回标准错误页面作为响应(实际上并不奇怪).
所以,我有几个问题：
>如何正确抛出错误？
> Response.Status属性有什么作用？
谢谢大家！
最佳答案
您将能够从javascript端获取响应状态,执行以下操作：
$.ajax({
type: 'POST',data: { id: $("#EventID").val() },success: function(data,textStatus,jqXHR) {
// jqXHR.status contains the Response.Status set on the server
},error: function(jqXHR,errorThrown) {
// jqXHR.status contains the Response.Status set on the server
}});
如您所见,您必须将错误函数传递给ajax函数…在您的示例中,您将函数设置为jqXHR的error属性,完全没有任何影响.
有关ajax事件的文档
jQuery文档说错误字符串将出现在errorThrown参数中.
不要使用Response
相反,你应该返回HttpStatusCodeResult：
[HttpPost]
public void UnfavoriteEvent(int id)
{
try
{
var rows = _connection.Execute("DELETE UserEvent WHERE UserID = (SELECT up.UserID FROM UserProfile up WHERE up.UserName = @UserName) AND EventID = @EventID",UserName = User.Identity.Name });
if (rows != 1)
{
return new HttpStatusCodeResult(500,"There was an unknown error updating the database.");
}
}
catch (Exception ex)
{
return new HttpStatusCodeResult(500,ex.Message);
}
}
